Norovirus and other ‘stomach viruses’ can spread through saliva

A class of viruses known to cause severe diarrheal diseases — including the one famous for widespread outbreaks on cruise ships — can grow in the salivary glands of mice and spread through their saliva, scientists have discovered. The findings show that a new route of transmission exists for these common viruses, which afflict billions of people each year worldwide and can be deadly.

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